Be certain to MUTE your MICROPHONE when your site is not addressing the entire group.
Connect to the video conference event 10 to 15 minutes early.
Have phone numbers of other group members participating in the video conference so that you can communicate with all participants if you are having problems.
Prepare your students for participation. Discuss etiquette of attending a video conference (remain quiet while a classmate is speaking and your microphone is live, listen attentively while other sites and the presenter are addressing the group, speak clearly when addressing the group).
TEST, TEST, TEST your connection prior to the event.
Tips and Tricks for a Successful Video Conference